Superheat regulator



B. BROIDO. v

SUPERHEAT REGULATOR.

APPLICATION men DEC. 18. 1920.

1,433,981. I Patented 0cm. 31,1922.

' 3 SHEETSSHEET. 2-

ll I! ll BENJAM\N Baouoo 3mm @5 His wtOZ'l HMJ by steam pipe 9.

l atented (lot. 31, 1922.

* UNITED STATES PATENT OFFICE.

BENJAMIN BROIDO, OF YORK, N. Y., ASSIGNOR'TO THE SUPERHEATER COMPANY,

OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

SUPEEHEAT REGULATOR.

Original application filed April 10,1918, Serial No. 227,803. Divided and this application filed December To all whom/it may concern: I

Be it known that I, BENJAMIN BRomo, a citizen of the United States, and resident of New York, N. Y., have invented certain new and useful Improvements in Superheat Regulators, of which the following is a specification. I

My invention has reference to so-called regulators, the function of which is to reduce the amount of super-heat that has been imparted to .steam in the superheater after its generation in the boiler. It has for its object the provision of improved apparatus for controlling the amount of heat abstracted from the superheated steam by the regulator. i

This application is a division of my application, Serial Number227,803, filed April Lin the drawings filed herewith and jor mingpart hereof, Fig. 1 shows my lnvention in place in connection with a water tube boiler of a well-known type; Fig. 2 shows a sectionalview, on an enlarged scale, on line 2 -2v of Fig. 1; Fig. 3 is a sectional view, on astill larger scale, on line 3 3 of Fig. 2;

F 4 illustrateson a still larger scale a .valve and itscontrolling element used in my. invention. 1

, Throughout the vlews portions have been brolrenaway and sectioned where this con duc ed to clearness.

The boiler, composed of upperdrum ,1, lower drum 2, and tubes 3 connecting them, is enclosed in the housing 4;. Gaseson their way from furnace 5 to stack connection 6 are guided in their passage over the tubes 3 by the baffles 7. Water is fed to the boiler by pipe 8,and steam leaves the upper drum This pipe conveys it to the header 10 of ,the superheater, whence it flows bythe pipes 11 to the superheater elements12, which extend into the spaces between therows of tubes 3. Here it is superheated by the gases, and then returns by way of the pipes 13 to header 14:, which it leaves by pipe 15.. I

, As far as described the apparatus is well will nowbe given.

Instead of taking the steam from header 14; directly to the engine, or other point of use, I first carry it to and through a regu Adescription of my improvement Serial No. 431,608.

lator, when its temperature is regulated as Wlll be described farther on. This idea in itself is not new, but the arrangement of my regulator, and the means I use for obtaining an amount of regulation varying as desired are novel as far as I am aware.

The regulator itself, designated by referencenumeral16, is placed in the proximity of the upper drum 1, and at a little distance above the water level, indicated by dotted line a.

The regulator comprises the cylindrical shell 17, provided at each end with a flange 18, to which are bolted the flanges 19--19 of the headers 20-20. Between each flange 18 and its connected flange 19 there is clamped a tube sheet 21. Tubes 22 extend between these two tube sheets and have their ends rolled into or otherwise secured to them.

I Steam pipe 15 is connected tothe left hand header 20, and from the right one leads the steam pipe 15.

At its lowest point the regulator drum 1? is connected by pipe 23 with the water space of the boiler. Pipe 23 is provided with the normally open valve 24. The highest point of drum 17 is connected by means of pipe 25 with the steam main 15. This pipe 25 is provided with the normally open valve 26, with the special valve 27, and with the thermostatically controlled valve 28. The valve 27 permits steam flow from the regulator drum 1? to themain 15 but will not permit water to flow through it.

Its construction will be readily understood from Fig. 3. Its casing 29 is closed at the top by cover 30, through which extends the opening 31 communicating with pipe 25. The lower-end of opening 31 is provided with the seat 32, in the shape of a spherical segment. Aball 33 of the same radius as the seat 32 is placed within the casing. At some distance from the top of the casing, sufficient to give the ball 33 some play, is the perforated plate 34, supported on lugs 35. The bottom of the casing is provided with an opening 36 communicating with a length of the pipe 25.

The ball 33 is of material light enough to float on'water, but heavy enough to sink in steam of the pressure and temperature used, and of course capable of resisting the conditions of temperature, moisture, and pressure involved. i Thevalve 28 and its co-operating thermostatic element 38 are illustrated on arren= .la rged scale in Fig. 4;" The spring 5ltends to keep the balanced valve 50 in'housing 3"? closed, this tendency being opposed by pressure exerted by the fluid in chamber 52am- .ating thevalve through rod 53. The pres- Surein' chamber 52 varieswith thelamount of fluid forced into the chamber, or allowed 7 to leavethe;chamber, through pipe 39, the -other' end of which communicates with chamber 5-1. Fluid is forced from the chamber 54 or allowed to enter it through pipe 39 in response to a rise or a drop respectively of the temperature of element 38.

The valve and its control are of a known commercial type andit is not thought necessary to enter further intoany detailed descr ption of lts construction, as its precise form is not a part of my lnventlon. -Its action is such that "when the temperature of ,thesteam in pipe falls below a certain point the valve is closed; when said temperature rises above a certainhigher point,

the valve-is wide open; while at intermediate I temperatures the valve assumes corresponding intermediate positions. Any thermostatically controlled valve answering these requirementsand otherwise suitable maybe substituted for the one shown and described.

'fThe highest point of pipe is at'a considerable elevation, the exact distance depending-,on circumstances, as willbe explained below. I

The action of theapparatus is follows. i

The steam on'its passage from pipe 9 through the superheater to pipe 15 inevitably experiences a pressure drop,'so that the pressure onthesurface a in the drum 1 eX- 1 ceeds: slightly that within; steam pipe .15"

and within casing 17 of the regulator.

. r This difference in pressure forces water up l7.

through pipe 23into'the regulator casing thehighestpointqof pipe 25 sufficiently so thedifference in pressure is insufficient to raise water to this highest point; and. in

addition there isput intorthis pipe 25. the valve 27, which, as exp ainedebove, closes 'the moment the; water fills it;

. Fromthisexplanation it will be clear that easingd'l will always tend to be filled with lwater. rThe heatingand vaporizing of this water will lower the temperature o f,the-

ee e meflew a t rong u e N11 st generated the, casing 17 passing through nt -ma n 15 and tending fartherto re- 'd c .empnan mr ij ws am h e5 iiiaiii. When the steam temperature in 15*- The difference in pressure is slight, but gis sufficient to raise the water high enough to ,fillcasing l'7. To guard against water passing, over into the main by means of pipe 25, the doubleprecaution is taken of elevating is at such a point, that the valve 28 is partly closed and prevents "the free passage of steam through pipe 25,11 certain amount of back pressure builds up, with the result that the waterdevelf in casing "17 fallsmThe "amount which'thisjilevel is depressed evihave. the maximum possibleefiect. Below such po nt 1t gradually closes with a drop in temperature. When 1t is entirely closed,

the regulator drum will evidently. remain filled only with steam which will assume the same temperature as that flowing through thetubes 22, and no farther regulating effect'occurs i What I claim is;

, 1. In apparatusof the class described, and l in combination, a boiler, a .s'uperheater, a regulator of the type in which thetempen ,ature of the superheated steam ,flowing through it is lowered bywater notjin direct I contact withit by an amount dependingon the amount, of water in the regulator,} a congduit from the boiler to theSuperheater, a

second conduit from the superheater to regulator, a third :conduit carrying steam from the .regulator, the re'gulator being placed above the water level of the boiler, a pipe connecting a low point of. the regulator water space with the boiler water space", a

pipe connectinga high point of the water space with one of the said conduits comma pica-ting with the regnl atorand two valves in said last .named pipethe first adjacent to the regulator and permittingflow of steam but not of water from the regulator tothe conduit and the other operative responsively to the temperatureiof the steam in. the conduit. assuming Tia closed position when the steam=teinperature falls below a and intermediate positionsfor intermediate points, said last named-pipe extending to a considerable elevation above the; regulator. 2. Inapparatus-of the-class described, and in c ombination a boiler, asuperhea-ter, a

H regulator of the type in which the temperature of superh'eated steam flowing through it is loweredby water not indirect contact with it ,by an. amount depending upon the predetermined point, anentirely open posi 7 tion a, secondhigher .predetermined point,

:Iam oiint of water in the regulator, a conduit from the boiler to the superheater, aisecond yconduit from, the, superheat'er fto the "regullatori,,third.co-nduitlcarrying steam from the regulator," the regulates beingplac ed ebev i e-" a erl vd d 'l h bo er, a P P nec hs Tl W aPQint of. he" ree to et if pfee the-M er nat l-sl me :a p ipe connectmg'"ahigh point of the water space with one of the said conduits commit nicating with the regulator.

3. In apparatus of the class described, and in combination, a boiler, 21 SUPGlllGfl-Uil', a regulator of the type in which the ten]- peruture oi the superheated steam flowing through it is lowered by Water not in direct contact with it by an umount depending upon the amount oi" Water in the regulator, the regulator being placed above the water level of the boiler, means to conduct the steam from the boiler through the superheater and thereupon through the regulator means actuated by the pressure difference caused by the pressure loss in the super-' heater to force boiler Water into the regulator Water space, and means operatlve responsively to the temperature of the superheated steam to control the amount of Water torced into the regulator.

4. In apparatus of the clash described,'

and in combination, a boiler, 21 superheater, aregulntor of the type in which the temperature ot' the su] )erheated steam flowing through it is lowered by Water not direct contact with it by an amount depending upon the amount of Water in the regulator, the regulator being placed above the Water level of the boiler, means to conduct the steam fIOfllllllQ boiler through the superheater and thereupon through the regulator, and means actuated by the pressure difference caused by the pressure loss in the superheater to force boiler Water into the regulator Water space.

BENJAMIN BROIDO. 

